Lighting-fixture.



w. E. COCHRAN. LIGHTING FIXTURE.

APPLICATION FILED DEC. 19. 19!]- 00 1 9 I 3 0w 6 D d 6 t H E t a D1 ryeeases.

- ing fixtures.

The primary object .zof'the invention is- --a field of illumination ofCleveland, in the county wnsnn'r n. coonnan, or cnnvnnann, oI-rro.

nrsnrmarrx'runn.

To all whom it may concern: v Be it known that I, WESLEY E. COGHRAN, acitizen of the United States, residing at State of Uhio; have inventedcertain new and useful Improvements in Light ng-Fixtures, or which thefollowing is a sp'ecification.

My invention relates to improvements in lighting fixtures, and more,.articularly to that class or type known'as indirect lightthe provisionof a generally improved fixture of this class which will be exceedinglysimple in construction, cheap of manufacture, and efficient in use.

A further object is the lprovision of-a more openv double reflectorcomprising two optil positely extending connected or truncated conoidalreflectors having their constricted or truncated portions'surrounding'the source horizontal-plane, said conoidal reflectors beingarranged in cooperative relation to the source of illumination and theoverhanging main or canopy reflector, and being particularly adapted foruse in lieu of and as an improvement 'on the ordinary bowl-shapedsecondary or pendant reflector now in common use in this class oflighting fixtures.

A still further object is the'provision of an improved fixture of thisclass particularly designed and adapted for use in connection with alamp bulb of the nitrogen type now in extensive use, and which not onlgives a very intense light at its filament, ut has an elongated bulbstem. or. shank, and with this end in view, my invention further relatesto an improved hollow ventilated main i Specification of Letters Patent.Application filed December w, 19l7 Serial No. 207,848.

of Cuyahoga and u material. of illumination in substantially the same u'like parts throughout all the figures of the Patented Dee. a, rate,

or canopy reflector, together with improved means for assembling andconnecting'the. improved arts.v

A still an i proved fixture of this class which adap ed not only-toprovide for a proper circu ation of air about the lamp bulb to cool andprolong the life of the latter, but one which isparticularly sanitaryand safe in use, being particularly free from dust collecting openingsor pockets, and at the same time presenting an ornamental and attractiveoutline and artistic appearance.

With the above mentioned and other ends in view, the invention consistsin the novel construction, arrangement, and combination ofparts,hereina'fter described, illustrated in one of its embodiments inthe accompanying the appended claims i Referringto the drawings, formingapart of this specification, Figural, is a vertical central sectionalview of a lighting fixture onstructed in accordance with this invention.v Fig. 2, a fragmentary sectional view of a slightly modified form ofthe improved secrth er. object is the provision of drawings, andparticularly pointed out in ondary or open ended double reflector andshowing the latter made of glass or vitreous Similar numerals ofreference designate drawings. a

of any's'uitable and convenient form, but, in the present instance, isprovided on its underside with an annular concaved portion adapted todeflect the light rays downvwardlya'nd outwardly therefrom as receivedfrom the subjacent source of illumination and secondary reflector ashereinafter described. The main or canopy reflector may "'be'suspendedby means of a supporting thim- The main or canopy reflector 1, maybesocket 3. The lamp socket 3, in the present instance, is provided with alamp bulb 4, of the nitrogen type, and which therefore embodies a longor elongated neck portion 4 As the light at the filament 4 is veryintense, the usual reflector bowl of translucent material is suspendedbelow the lamp bulb so as to prevent any direct rays from beingprojected directly downwardly and outwardly therefrom to come intocontact with the eyes of any person or persons immediately below thelamp, but such pendant reflector bowls greatly impair the efliciency ofthe lamp because many of the direct rays are obviously lost or diffused.

Referring now to the present or improved reflector it will be seen thatthe same comprises a concentrically mounted open double reflector madeup of upper and lower truncated conoidal reflectors 5 and 5respectively, the constricted or truncated portions of the reflectors 5and 5, being joined to form a constricted or ray diVidiIlg angularportion 5", arranged substantially in the same horizontal plane with thefilament 4 and preferably slightly above the central portion thereof, asshown. This arrangement permits the direct rays 6, from the filament topass directly downwardly and outwardly unobstructed through the openportion of the reflector 5*, and it will be obvious that the eyes of anyoccupant in the room being illuminated directly beneath such lamp arenot likely to be reached by such substantially vertically extendingrays, and any other rays extending at a greater or less acute angle suchas the rays 6, will strike the curved sides of the reflector 5 and bereflected down as the reflected rays 6..

As a means of cutting out any glaring rays from the main or canopyreflector 1, and particularly as a means of intercepting and reflectingsuch direct lateral rays 6, emanating from and above the filament orlight source 4 which would otherwise pass directly beyond and beneaththe canopy reflector 1, the upper conical reflector 5 is provided, saidreflector 5, being adapted to reflect such rays upwardly against themain or canopy reflector and to be reprojected by the latter as the rays6 while still other rays 6", as shown reach the main or canopy reflectordirectly and are reflected by the latter downwardly and outwardly asindicated. I It will be seen that the rays of light emanating from thefilament or source of illumination 4:", at a very acute angle passupwardly and downwardly therefrom without striking the reflectors 5 and5, while those emanating at less acute angles to the respective axialplanes of such reflectors are caught and reprojected by the latter asshown and above explained.

The double or open endedsecondary reflector may be suspended beneath thecanopy reflector 1, in any suitable and convenient manner, and, in thepresent instance, by-

means of link rods 7, provided with hooks 7, connected to the centraldepending conical portion 1", of the main reflector and provided attheir outer-ends with thumb nuts 7*, threaded thereon.

As a means of particularly adapting the improved fixture to a lamp bulb4, of the nitrogen type, the canopy reflector 1, comprises a hollowdouble walled structure having central openings 1, to receive the neckportion 4, and spaced therefrom to form air circulating passages, and asa means of ventilating the chamber formed between the walls of thecanopy reflector, the supporting thimble 2, is provided with outletports 2 While I hate shown the open ended double reflector as comprisingtwo sheet metal conoidal reflectors 5 and 5, liavin theirtruncatedportions connected to eacli other by means of a seam or joint to formthe angular or reduced portion 5, as shown in Fig. 1, of the drawings,it will be apparent that these reflectors 5 and 5, may be made integralof glass or other suitable vitrious material as indicated in Fig. 2, ofthe drawings, and it will be understood that the interior surfaces ofthe reflectors 5 and 5, when made of metal are provided with a suitablerefracting surface or coating, such for example as, white porcelainenamel, or the like, and so likewise as to the annular concaved portion1, of the canopy reflector 1.

From the foregoing description, taken in connection with theaccompanying drawings, the operation and advantages of my invention willbe readily understood.

Having thus described one of the embodiments of my invention, what Iclaim and desire to secure by Letters Patent, is,-

1. A lighting fixture, comprising a canopy reflector, a light source,and upper and lower truncated open conoidal reflectors surrounding saidlight source, and having their light vintercepting and refractingportions above flector. or below at acute angles of-more than otherintercepting such rays as extend in. forty-five degrees to therespectivefaxial planes of approximately forty-five degreesplanes ofsaid reflectors. v and more to the common axial plane of said 3. In alighting fixture, a light source, a, main and secondary reflectors e 5main reflector, and a double open ended In testimony whereof I have.afiixed my 1% secondary reflector embodying truncated signature in thepresence 'of two witnesses; conoids, one of said conoi'ds interceptingall WESLEY E. COCHRANL; such'rays of light emanatin from and aboveWitnesses: v ysaid lightsource which won (1 otherwise passf W. C.GRAVES,

it directly beneath said main reflector, and the 0. C. BILLMZAN.

